Year	% net
1999	54.28208
2000	55.49511
2001	57.53743
2002	59.38952
2004	58.87307
2005	59.14477
2008	60.60095
2009	60.58699
2010	63.73858
2011	62.84086
2013	67.89989
2014	66.38761
2015	67.45334
2017	61.71676